Diffusion Weighted Imaging… And you thought the physics were bad enough. What is “abnormal” restricted diffusion? Why do we need 2 different sequences to call it, and how can all these pathologies in the body look so similar yet be so different at the same time? The answers to all these questions and more are waiting in this lecture taught by a radiologist, for radiologists, as well as for any other curious minds out there interested in how we use diffusion weighted imaging to make medical diagnoses.